Google plans Pixel Watch hypertension screening study via Fitbit code

Google is preparing a research study to explore whether the Pixel Watch can screen for hypertension, according to details embedded in the most recent Fitbit for Android app code. The analysis of version 4.53 of the app indicates Google plans to invite users to join a Fitbit Hypertension Study in which consenting participants would complete a questionnaire and allow their watch to passively collect sensor data during normal wear. A randomly selected subgroup would also be asked to wear a blood pressure monitor for 24 hours and would receive about $50 for returning the equipment, the code indicates. The app warns that participating could increase battery consumption.

The study appears aimed at developing an algorithm that flags patterns associated with high blood pressure rather than producing cuff-style blood pressure readings. That approach mirrors the method Apple recently introduced for some Apple Watch models, which uses optical heart sensor data and machine learning to identify patterns over a 30-day period that may suggest chronic high blood pressure. Apple has emphasized that its feature does not measure blood pressure directly and is intended to prompt medical follow-up...